Fiber source



FIG. 1 is a perspective view of the design for a fiber source;

FIG. 2 is a top view of the design of FIG. 1;

FIG. 3 is a right side view of the design of FIG. 1, the left side view being a mirror image thereof;

FIG. 4 is a bottom view of the design of FIG. 1;

FIG. 5 is a front end view of the design of FIG. 1; and,

FIG. 6 is a rear end view of the design of FIG. 1.

The broken lines showing in FIGS. 1 and 2 are for illustrative purposes only and forms no part of the claimed design. 

I claim the ornamental design for a fiber source, as shown and described. 